A self-powered piezoelectret sensor based on foamed plastic garbage for monitoring human motions  

作　　者：Yujun Shi Kaijun Zhang Sen Ding Zhaoyang Li Yuhao Huang Yucong Pi Dazhe Zhao Yaowen Zhang Renkun Wang Binpu Zhou Zhi-Xin Yang Junwen Zhong 

机构地区：[1]Department of Electromechanical Engineering and Centre for Artificial Intelligence and Robotics,University of Macao,Macao 999078,China [2]Joint Key Laboratory of the Ministry of Education,Institute of Applied Physics and Materials Engineering,University of Macao,Avenida da Universidade,Macao 999078,China [3]State Key Laboratory of Internet of Things for Smart City and Department of Electromechanical Engineering,University of Macao,Macao 999078,China

出　　处：《Nano Research》2023年第1期1269-1276,共8页纳米研究（英文版）

基　　金：We acknowledge the funding support from the Science and Technology Development Fund,Macao SAR(FDCT)(Nos.0059/2021/AFJ,0040/2021/A1,0018/2019/AKP,and SKLIOTSC(UM)-2021-2023);the Start Research Grant from University of Macao(No.SRG2021-00001-FST).

摘　　要：Constructing piezoelectret based on foamed plastic garbage is an advisable strategy for obtaining self-powered flexible electromechanical sensors with good performances.Herein,a self-powered piezoelectret sensor with basic material of low density polyethylene(LDPE)foamed plastic garbage is proposed,with characteristics of easy fabrication,excellent flexibility,and high equivalent piezoelectric coefficient d33 value up to~1,100 pC/N.The output stability is verified by continuously stimulating a sensor for~180,000 cycles under low and high applied pressure,and the variations of peak outputs are less than 5.5%.Applications for measuring low-and high-pressure signals from human body are achieved.Assembled with a wristband,a sensor is demonstrated for detecting the human pulse waves.Moreover,real time human sitting information is wirelessly monitored with a smart chair based on 4 pixels sensors array.

关 键 词：wearable electronics piezoelectret SELF-POWERED pressure sensor mobile health 

分 类 号：TP212[自动化与计算机技术—检测技术与自动化装置]